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1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.android.server.usb.descriptors.tree;
17 
18 import com.android.server.usb.descriptors.UsbConfigDescriptor;
19 import com.android.server.usb.descriptors.report.ReportCanvas;
20 
21 import java.util.ArrayList;
22 
23 /**
24  * @hide
25  * Represents a configuration in the descriptors tree.
26  */
27 public final class UsbDescriptorsConfigNode extends UsbDescriptorsTreeNode {
28     private static final String TAG = "UsbDescriptorsConfigNode";
29 
30     private final UsbConfigDescriptor mConfigDescriptor;
31 
32     private final ArrayList<UsbDescriptorsInterfaceNode> mInterfaceNodes = new ArrayList<>();
33 
34     /**
35      * Constructor.
36      * @param configDescriptor   The Config Descriptor object wrapped by this tree node.
37      */
UsbDescriptorsConfigNode(UsbConfigDescriptor configDescriptor)38     public UsbDescriptorsConfigNode(UsbConfigDescriptor configDescriptor) {
39         mConfigDescriptor = configDescriptor;
40     }
41 
42     /**
43      * Adds the inteface node logical contained in this configuration.
44      * @param interfaceNode The inteface treenode to assocate with this configuration.
45      */
addInterfaceNode(UsbDescriptorsInterfaceNode interfaceNode)46     public void addInterfaceNode(UsbDescriptorsInterfaceNode interfaceNode) {
47         mInterfaceNodes.add(interfaceNode);
48     }
49 
50     @Override
report(ReportCanvas canvas)51     public void report(ReportCanvas canvas) {
52         mConfigDescriptor.report(canvas);
53 
54         canvas.openList();
55 
56         // Interfaces
57         for (UsbDescriptorsInterfaceNode node : mInterfaceNodes) {
58             node.report(canvas);
59         }
60 
61         canvas.closeList();
62     }
63 }
64